Struct UniformMap

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pub struct UniformMap { /* private fields */ }

Methods from Deref<Target = Map>§

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pub fn clear(&self)

The clear() method removes all elements from a Map object.

MDN documentation

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pub fn delete(&self, key: &JsValue) -> bool

The delete() method removes the specified element from a Map object.

MDN documentation

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pub fn for_each(&self, callback: &mut dyn FnMut(JsValue, JsValue))

The forEach() method executes a provided function once per each key/value pair in the Map object, in insertion order. Note that in Javascript land the Key and Value are reversed compared to normal expectations:

§Examples

let js_map = Map::new();
js_map.for_each(&mut |value, key| {
    // Do something here...
})

MDN documentation

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pub fn get(&self, key: &JsValue) -> JsValue

The get() method returns a specified element from a Map object.

MDN documentation

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pub fn has(&self, key: &JsValue) -> bool

The has() method returns a boolean indicating whether an element with the specified key exists or not.

MDN documentation

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pub fn set(&self, key: &JsValue, value: &JsValue) -> Map

The set() method adds or updates an element with a specified key and value to a Map object.

MDN documentation

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pub fn size(&self) -> u32

The value of size is an integer representing how many entries the Map object has. A set accessor function for size is undefined; you can not change this property.

MDN documentation

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pub fn entries(&self) -> Iterator

The entries() method returns a new Iterator object that contains the [key, value] pairs for each element in the Map object in insertion order.

MDN documentation

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pub fn keys(&self) -> Iterator

The keys() method returns a new Iterator object that contains the keys for each element in the Map object in insertion order.

MDN documentation

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pub fn values(&self) -> Iterator

The values() method returns a new Iterator object that contains the values for each element in the Map object in insertion order.

MDN documentation

Methods from Deref<Target = Object>§

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pub fn constructor(&self) -> Function

The constructor property returns a reference to the Object constructor function that created the instance object.

MDN documentation

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pub fn has_own_property(&self, property: &JsValue) -> bool

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

MDN documentation

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pub fn is_prototype_of(&self, value: &JsValue) -> bool

The isPrototypeOf() method checks if an object exists in another object’s prototype chain.

MDN documentation

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pub fn property_is_enumerable(&self, property: &JsValue) -> bool

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

MDN documentation

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pub fn to_locale_string(&self) -> JsString

The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.

MDN documentation

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pub fn to_string(&self) -> JsString

The toString() method returns a string representing the object.

MDN documentation

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pub fn value_of(&self) -> Object

The valueOf() method returns the primitive value of the specified object.

MDN documentation

Methods from Deref<Target = JsValue>§

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pub fn into_serde<T>(&self) -> Result<T, Error>
where T: for<'a> Deserialize<'a>,

👎Deprecated: causes dependency cycles, use serde-wasm-bindgen or gloo_utils::format::JsValueSerdeExt instead

Invokes JSON.stringify on this value and then parses the resulting JSON into an arbitrary Rust value.

This function is deprecated, due to creating a dependency cycle in some circumstances. Use serde-wasm-bindgen or gloo_utils::format::JsValueSerdeExt instead.

This function will first call JSON.stringify on the JsValue itself. The resulting string is then passed into Rust which then parses it as JSON into the resulting value.

Usage of this API requires activating the serde-serialize feature of the wasm-bindgen crate.

§Errors

Returns any error encountered when parsing the JSON into a T.

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pub fn as_f64(&self) -> Option<f64>

Returns the f64 value of this JS value if it’s an instance of a number.

If this JS value is not an instance of a number then this returns None.

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pub fn is_string(&self) -> bool

Tests whether this JS value is a JS string.

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pub fn as_string(&self) -> Option<String>

If this JS value is a string value, this function copies the JS string value into Wasm linear memory, encoded as UTF-8, and returns it as a Rust String.

To avoid the copying and re-encoding, consider the JsString::try_from() function from js-sys instead.

If this JS value is not an instance of a string or if it’s not valid utf-8 then this returns None.

§UTF-16 vs UTF-8

JavaScript strings in general are encoded as UTF-16, but Rust strings are encoded as UTF-8. This can cause the Rust string to look a bit different than the JS string sometimes. For more details see the documentation about the str type which contains a few caveats about the encodings.

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